LONDON—The U.K. economy grew strongly economy expanded 0.8% between the second and third quarters, an annualized rate of 3.2%.The nation's current-account deficit widened to £20.7 billion ($33.89 billion), a shortfall equivalent to 5.1% of overall gross domestic product. That is the widest deficit as a percentage of GDP since 1989.Business investment grew 2% between the second and third quarters, and figures suggest the economy grew faster in 2012 than earlier estimates. The ONS said the U.K. economy is now 2% smaller than it was before recession struck in 2008, not 2.5% as previously thought. The economy also appears to have got off to a good start in the final quarter. Data for October showed the services sector, which accounts for the bulk of U.K. output, expanded 2.1% on a year earlier.The economy also appears to have got off to a good start in the final quarter. Data for October showed the services sector, which accounts for the bulk of U.K. output, expanded 2.1% on a year earlier.